Installation guide

CHAPTER
ShoreTel 14.2 Planning and Installation Guide 43
3. Network Requirements and
Preparation
This chapter describes the network requirements and preparation needed to use the ShoreTel system.
It contains the following information:
Overview ................................................................................................................... 45
Understanding the Network Requirements for Toll-Quality Voice ............................. 45
Bandwidth Requirements.................................................................................... 46
Latency ............................................................................................................... 47
Jitter for Voice Switches ..................................................................................... 47
Packet Loss ........................................................................................................ 48
Bandwidth Management..................................................................................... 48
Local Area Network (LAN).................................................................................. 48
Virtual LANs........................................................................................................ 49
Wide Area Network............................................................................................. 49
Client Bandwidth................................................................................................. 49
Distributed Call Control Signaling....................................................................... 50
Admission Control in the Wide Area Network..................................................... 50
Spanning Tree Protocol ...................................................................................... 50
Traffic Shaping to Reduce Bottlenecks............................................................... 51
Echo Cancellation............................................................................................... 51
WAN Technology Choices .................................................................................. 52
WAN Technology Choices......................................................................................... 52
Minimum Bandwidth Requirements .................................................................... 52
Leased T1........................................................................................................... 52